Made for Charles Gordon the eccentric Victorian collector – as with most of his incredible collection, he never fired them.
16-bore; 30 3/4″ barrel (original length) completed February 1st 1890 (long after percussion became obsolete)
If you want to know what original colour case hardening, and blacking looked like from the greatest era these are a good example
Incredible scroll engraving. Likely as good as it gets.
Gordon has been mentioned here before I believe. Twice, it seems.